JP6498775B2 - Stator and rotating electric machine - Google Patents

Description

  The present invention relates to a stator and a rotating electric machine.

There are two types of stator windings: concentrated winding for concentrating and winding a wire for each tooth to form a coil, and winding a strand across a plurality of slots, and a coil of different phase or in phase at the coil end. There are distributed windings that overlap each other. Concentrated winding can make a coil end smaller than distributed winding, and is effective in reducing the size and efficiency of a rotating electrical machine. Further, since winding is concentrated on one tooth, it is easier to wind than distributed winding, and the coil space factor in the stator slot is improved.
Generally, there is one type of winding pattern of the concentrated winding coil, and Patent Document 1 shows a case where there is one type of winding pattern (see Patent Document 1).

JP 2009-131025 A

  When there is only one type of winding pattern as in the stator described in Patent Document 1, the winding end positions of the U-phase, V-phase, and W-phase concentrated winding coils are the same. To the U-phase, V-phase, and W-phase connection rings. Since the stator radial direction position of the connection ring of each phase is different, the length of the wiring from the winding end position to the connection ring is different depending on the phase. When the wiring from the winding end position to the connection ring becomes long, there is a risk that the wire breakage is likely to occur due to vibration or the like.

(1) The stator according to claim 1 is a stator core in which a plurality of stator coils having salient pole concentrated windings and a plurality of teeth around which a plurality of stator coils are wound are formed. And a plurality of connection rings that connect each of the multi-phase stator coils, and each winding end position of the multi-phase stator coils is closest to the corresponding connection ring among the plurality of connection rings. disposed, wherein each of the plurality of phases of stator coils, that are at different positions of end the winding by changing the number of stages and / or number of columns of the winding for each phase.
(2) The stator according to claim 4 is a stator iron core in which a plurality of stator coils having salient pole concentrated windings and a plurality of teeth around which a plurality of stator coils are wound are formed. And a plurality of connection rings that connect each of the multi-phase stator coils, each of the plurality of connection rings having a different diameter, and each winding end position of the multi-phase stator coil is in the radial direction. It exists in three or more different positions, wherein each of the plurality of phases of stator coils, that are at different positions of end the winding by changing the number of stages and / or number of columns of the winding for each phase.
(3) A rotating electrical machine according to a sixth aspect is the rotor according to any one of the first to fifth aspects, and a rotor arranged to be rotatable with respect to the stator core via a predetermined gap. And comprising.

  According to the present invention, disconnection can be prevented.

It is a perspective view of the rotary electric machine which is one Embodiment of this invention. It is sectional drawing of the connection part of the concentrated winding coil of Example 1, (a) shows the state which connected the U phase, (b) shows the state which connected the V phase, (c) connected the W phase. Shows the state. It is a figure which shows the winding pattern of each phase of the concentrated winding coil of Example 1. FIG. It is sectional drawing of the connection part of the concentrated winding coil of Example 2, (a) shows the state which connected the U phase, (b) shows the state which connected the V phase, (c) connected the W phase. Shows the state. It is a figure which shows the winding pattern of each phase of the concentrated winding coil of Example 2. FIG. It is sectional drawing of the connection part of the concentrated winding coil of a prior art example, (a) shows the state which connected the U phase, (b) shows the state which connected the V phase, (c) connected the W phase. Indicates the state. It is a figure which shows the winding pattern of each phase of the concentrated winding coil of a prior art example. It is a comparison figure of the concentrated winding coil of Example 1, 2 and the concentrated winding coil of a prior art example. It is a figure which shows the structure of the vehicle carrying a rotary electric machine. It is a figure which shows a modification.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In the following description, an electric motor used in an electric vehicle and a hybrid electric vehicle will be described as an example of the rotating electric machine. However, the rotating electric machine of the present invention is limited to driving an electric vehicle or a hybrid vehicle. It is not a thing.

--- Example 1 ---
FIG. 1 is a perspective view of a rotating electrical machine according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the connection portion of the concentrated winding coil. FIG. 3 is a diagram showing a winding pattern of each phase of the concentrated winding coil.
As shown in FIG. 1, the rotating electrical machine 100 includes a concentrated winding stator 8 and a rotor 9 that are coaxially arranged, and the rotor 9 has N-pole and S-pole permanent magnets alternately on the side surface of the core. Is provided. The rotor 9 is disposed so as to be rotatable with respect to the concentrated winding stator 8 through a predetermined gap.
The concentrated winding stator 8 includes a plurality of cores 5 having a split core structure, and a concentrated winding coil 7 formed by winding the insulating film conductor 1 (see FIG. 2) is provided on the teeth 5a (see FIG. 3) of each core 5. It has been. An annular connecting plate 2 is disposed on the axial end surface of the core 5 to form a coil end. A plurality of through holes 20 (see FIG. 2) are opened in the connection plate 2, and the coil terminal 10 of the concentrated winding coil 7 is inserted therethrough. In this embodiment, the number of the concentrated winding coils 7 is 24, and the U-phase, V-phase, and W-phase concentrated winding coils 7 are repeatedly arranged 8 times.

As shown in FIG. 3, each of the cores 5 of the concentrated winding coil 7 has one tooth 5 a and partitions one slot 5 b between a pair of cores 5 adjacent in the circumferential direction. It is formed in a T shape in plan view. A plurality of slots 5b arranged in the circumferential direction is formed by assembling the core 5 in an annular shape.
In the following description, the concentrated winding coil 7 may be simply referred to as a coil for convenience.

  The concentrated winding coil 7 of the present embodiment is a stator coil having salient pole concentrated windings. Since there are two coil terminals 10 at the beginning and end of winding in one coil, the total number of coil terminals 10 is 48. The 24 winding start coil terminals 101 are arranged on the outer peripheral side of the connection plate 2, and the 24 winding start coil terminals 101 are connected to each other to form a neutral point N. Twenty-four winding end coil terminals 102 are divided into three phases (U phase, V phase, W phase) by 8 pieces and arranged at positions shifted in the radial direction on the inner peripheral side of the connection plate 2, The winding end coil terminal 102 having the same phase is drawn to a position having the same radius. Eight U-phase coils, eight V-phase coils, and eight W-phase coils are connected to form a three-phase concentrated winding stator 8.

In FIG. 2, the left side of the drawing is the inner diameter side of the concentrated winding coil 7, and the right side of the drawing is the outer diameter side.
FIG. 2A is a diagram showing a state in which the U phases are connected. A bobbin 6 is attached to the core 5 on which the electromagnetic steel plates are laminated, and a concentrated winding coil 7 is wound around the bobbin 6. As shown in FIG. 3, the concentrated winding coil 7 is wound around the recess of the bobbin 6. In addition, the coil terminals 101 and 102 of the insulation coating conductor 1 of the concentrated winding coil 7 include the connection plate 2 and the four connection rings 3 (3U (U phase), 3V (V phase), 3W (W phase), 3N (medium). It is inserted in one of the following points). here,
The four connection rings 3 are substantially circular with different diameters so that they can be arranged at the axial end portions (coil end portions) of the stator, and are arranged in one step on the same plane. In addition, the arrangement area of the three connection rings 3U (U phase), 3V (V phase), and 3W (W phase) substantially matches the width of the bobbin 6, and the connection ring 3N at the neutral point (N) is The width of the yoke portion 5c of the core 5 is substantially the same. For this reason, the four connection rings 3 (3U, 3V, 3W, 3N) are disposed within the radial width range of the concentrated winding stator 8.

  In FIG. 2A, the winding start coil terminal 101 is connected to the outermost connection ring 3 </ b> N arranged on the connection plate 2 to form a neutral point N. The winding end coil terminal 102 is connected to the second connection ring 3U from the innermost circumference arranged on the connection plate 2 to form the U phase. Although not shown in the neutral point N, a through hole 20 is formed in the connection plate 2 and a connection hole 30 is formed in the connection ring 3 at a position where the coil terminal 10 is inserted in both the U phase and the neutral point N. It has been. With this structure, the interphase insulation between the insulating film conductor 1 and the connection ring 3 of the concentrated winding coil 7 is maintained with the connection plate 2 interposed therebetween. In addition, the connection plate 2 is provided with a ring-shaped wall 21 to position each connection ring 3 and to ensure insulation between the connection rings 3.

FIG. 2B is a diagram illustrating a state in which the V phases are connected. The winding end coil terminal 102 is connected to the innermost connection ring 3V arranged on the connection plate 2 to form a V phase. Otherwise, the configuration is the same as that of the U phase.
FIG. 2C is a diagram illustrating a state in which W phases are connected. The winding end coil terminal 102 is connected to the third connection ring 3W from the innermost peripheral side arranged on the connection plate 2 to form a W phase. Otherwise, the configuration is the same as that of the U phase.

In the following description, the radial position around the rotation axis of the rotor 9 is simply referred to as a radial position or a radial position. In the following description, the outer diameter side along the radial direction centered on the rotation axis of the rotor 9 is simply referred to as the outer diameter side, and the inner diameter side along the radial direction centered on the rotation axis of the rotor 9. Is simply called the inner diameter side.
In the present embodiment, the end of winding of each coil differs in the radial position depending on the phase. As shown in FIG. 2A, the winding end position of the U-phase coil is the fourth turn from the outer diameter side. As shown in FIG. 2B, the winding end position of the V-phase coil is the innermost diameter side. As shown in FIG. 2C, the winding end position of the W-phase coil is the second turn from the outer diameter side. In any concentrated winding coil 7, the wire diameter and the number of turns of the insulating coating conductor 1 are equal.
As described above, in the present embodiment, by changing the position of the end of winding of each coil depending on the phase while making the wire diameter and the number of turns of the insulating coating conductor 1 equal in each phase, the vicinity of the connection ring 3 of each phase Place the end of the winding on. That is, in the present embodiment, the winding end position of each coil is disposed closest to the corresponding connection ring 3 among the plurality of connection rings 3. Thereby, since the length of the lead wire from the winding end to the connection ring 3 can be shortened, it is possible to prevent the lead wire, that is, the coil terminal 10 from being disconnected due to vibration or the like.

In this embodiment, in order to change the radial position of the winding end coil terminal according to the phase while making the wire diameter and the number of turns of the insulating coating conductor 1 equal in each phase, as shown in FIG. The pattern is changing.
The winding pattern shown as “top four turns” in FIG. 3 is the winding pattern of the U-phase concentrated winding coil 7 shown in FIG. The winding pattern shown as “the uppermost full turn” in FIG. 3 is the winding pattern of the V-phase concentrated winding coil 7 shown in FIG. The winding pattern shown as “top two turns” in FIG. 3 is the winding pattern of the W-phase concentrated winding coil 7 shown in FIG.

As shown in FIGS. 2 and 3, in the V-phase concentrated winding coil 7, the insulating film conductor 1 is wound up to the innermost diameter side at the uppermost stage of the winding in order to set the winding end position to the innermost diameter side. Yes.
In the U-phase concentrated winding coil 7, in order to wind the insulating film conductor 1 from the outer diameter side to, for example, 4 turns, further above the stage corresponding to the uppermost stage of the V-phase concentrated winding coil 7, The number of turns is reduced by, for example, four turns from the inner diameter side in a stage one level lower than the uppermost stage of the concentrated winding coil 7.
Further, in the W-phase concentrated winding coil 7, in order to wind the insulating film conductor 1 from the outer diameter side to the upper stage corresponding to the uppermost stage of the V-phase concentrated winding coil 7, for example, two turns, In the stage one level below the uppermost stage of the V-phase concentrated winding coil 7, the number of turns is reduced by, for example, two turns from the inner diameter side.
In this way, in order to change the radial position of the coil end at the end of the winding depending on the phase while making the wire diameter and the number of turns of the insulating coating conductor 1 equal in each phase, the winding patterns (number of stages and number of rows) are different from each other. You can use it.

--- Example 2 ---
In the first embodiment described above, the position of the winding end coil terminal is changed by changing the number of turns at the uppermost stage of the outer diameter side coil. However, the position of the winding end coil terminal can be changed by other methods. I can do it.
4 is a cross-sectional view of a connection portion of the concentrated winding coil 7 according to the second embodiment. FIG. 4 (a) shows a state in which the U phase is connected, and FIG. 4 (b) shows a state in which the V phase is connected. FIG. 4C shows a state in which the W phase is connected.
As shown in FIG. 4, the end of winding of each coil has a different radial position depending on the phase. As shown in FIG. 4A, the winding end position of the U-phase coil is the fifth turn from the outer diameter side. As shown in FIG. 4B, the winding end position of the V-phase coil is the second turn from the inner diameter side. As shown in FIG. 4C, the winding end position of the W-phase coil is the first turn from the outer diameter side.

FIG. 5 is a diagram showing a winding pattern of each phase of the concentrated winding coil 7 of the second embodiment shown in FIG. In the concentrated winding coil 7 of the second embodiment, for example, in the U phase and the W phase, by appropriately setting the number of turns from the outermost diameter side of the winding, the radial position of the coil end is changed, for example, V In the phase, the radial position of the coil end is changed by appropriately setting the number of turns from the innermost diameter side of the winding.
In FIG. 5, the winding pattern indicated as “topmost outer diameter side 5 turns” is the winding pattern of the U-phase concentrated winding coil 7 shown in FIG. In FIG. 5, the winding pattern shown as “topmost inner diameter side 2 turns” is the winding pattern of the V-phase concentrated winding coil 7 shown in FIG. In FIG. 5, the winding pattern indicated as “one turn on the outermost diameter side” is the winding pattern of the W-phase concentrated winding coil 7 shown in FIG.

As shown in FIGS. 4 and 5, in the V-phase concentrated winding coil 7 of the second embodiment, the insulating film conductor 1 is wound, for example, two turns from the inner diameter side at the uppermost stage of the winding.
In the U-phase concentrated winding coil 7, the insulating film conductor 1 is wound, for example, five turns from the outer diameter side at the uppermost stage of the winding. That is, in the concentrated winding coil 7 of the U phase, the number of turns at the uppermost stage is increased by, for example, 3 turns from the V phase. Therefore, in the concentrated winding coil 7 for the U phase, the number of turns in the U phase is made equal to the number of turns in the V phase by reducing the number of turns by, for example, three turns from the inner diameter side in the stage one step below the uppermost stage. ing.
In the W-phase concentrated winding coil 7, the insulating film conducting wire 1 is wound, for example, by one turn from the outer diameter side to the upper stage corresponding to the uppermost stage of the U-phase concentrated winding coil 7. Therefore, in the concentrated winding coil 7 for the W phase, the number of windings in the W phase is reduced by, for example, one turn from the inner diameter side at the stage corresponding to the uppermost stage of the concentrated winding coil 7 for the U phase. And the number of windings in the U phase.

  As in Example 2, the radial position of the coil end may be changed by appropriately setting the number of turns from the outer diameter side at the uppermost stage of the winding, and the number of turns from the inner diameter side can be changed appropriately. The radial position of the coil end may be changed by setting. As a result, the winding end can be arranged in the vicinity of the connection ring 3 of each phase, so that the length of the lead wire from the winding end to the connection ring 3 can be shortened, and the lead wire, that is, the coil terminal 10 is disconnected due to vibration or the like. Can be prevented.

  In order to easily understand the effect of the present invention, a conventional example of the concentrated winding coil 7 will be described with reference to FIGS. FIG. 6 is a cross-sectional view of a connection portion of a concentrated winding coil 7A of a conventional example, FIG. 6 (a) shows a state in which the U phase is connected, and FIG. 6 (b) shows a state in which the V phase is connected. FIG. 6C shows a state where the W phase is connected. FIG. 7 is a diagram showing a winding pattern of each phase in a conventional example. In the concentrated winding coil 7A of the conventional example, the radial position of the winding end coil terminal is the same for each phase, and the winding pattern is the same for each phase.

In FIG. 6, since there is only one radial position of the coil terminal, for example, the wiring from the winding end to the connection ring 3V in the V phase shown in FIG. 6B, that is, the lead wire is compared with the U phase and W phase. Become longer. Therefore, the coil terminal 10 in the V phase may be disconnected due to vibration or the like.
As can be seen from FIG. 7, when there is one type of winding pattern, there are places where the gap between adjacent coils becomes narrower and wider. Therefore, the coil space factor in the stator slot when the number of winding patterns is one is higher than that of distributed winding, but is lower than that when there are a plurality of types of winding patterns.

FIG. 8 shows a comparative view of the concentrated winding coil 7 of the first and second embodiments and the concentrated winding coil 7A of the conventional example.
In the concentrated winding coil 7A of the conventional example, the coil space factor in the stator slot is higher than that of the distributed winding as described above, but is lower than that in the case of a plurality of types of winding patterns. Moreover, in the concentrated winding coil 7A of the conventional example, as described above, depending on the phase, the length of the lead wire becomes long, and the mechanical strength of the lead wire may be lowered. On the other hand, in the concentrated winding coil 7 of Examples 1 and 2 described above in which there are three types of winding patterns, the coil space factor can be increased and the mechanical strength of the lead wire can be increased. It can be seen that this is superior to the concentrated winding coil 7A of the conventional example.

  The configuration of the vehicle on which the rotating electrical machine 100 according to this embodiment is mounted will be described with reference to FIG. FIG. 9 is a diagram showing a configuration of a vehicle on which the above-described rotating electrical machine 100 is mounted, and shows a power train of a four-wheel drive hybrid vehicle. This vehicle has an engine 200 and a rotating electrical machine 100 as main power on the front wheel side. The power generated by the engine 200 and the rotating electrical machine 100 is shifted by the transmission 300 and transmitted to the wheels (front wheel drive wheels). In driving the rear wheel, the rotating electrical machine 150 disposed on the rear wheel side and the wheel (rear wheel side driving wheel) are mechanically connected, and the power generated by the rotating electrical machine 150 is transmitted to the rear wheel side driving wheel. Communicated.

  The rotating electrical machine 100 starts the engine 200 and switches between generation of driving force and generation of electric power for recovering energy at the time of vehicle deceleration as electric energy according to the traveling state of the vehicle. The driving and power generation operation of the rotating electrical machine 100 are controlled by the power conversion device 400 so that the torque and the rotational speed are optimized in accordance with the driving state of the vehicle. Electric power necessary for driving the rotating electrical machine 100 is supplied from the battery 500 via the power converter 400. Further, when the rotating electrical machine 100 is in a power generating operation, the battery 500 is charged with electrical energy via the power conversion device 400.

  Here, the rotating electrical machine 100 which is the power source on the front wheel side is disposed between the engine 200 and the transmission 300 and has the above-described configuration. As the rotating electric machine 150 that is the driving force source on the rear wheel side, the same rotating electric machine as that of the rotating electric machine 100 described above can be used, and rotating electric machines having other general configurations can also be used. Note that the present invention can also be applied to hybrid systems other than the four-wheel drive system.

  As described above, according to the present invention, it is possible to provide a stator for a rotating electrical machine that is excellent in mechanical strength while maintaining the small size and high efficiency characteristics of salient pole concentrated winding.

According to embodiment mentioned above, there exists the following effect.
(1) The concentrated winding stator 8 has a split core structure in which a plurality of concentrated winding coils 7 having salient pole concentrated windings and a plurality of teeth 5a around which the plurality of concentrated winding coils 7 are wound are formed. The plurality of cores 5 and the plurality of connection rings 3 that connect the concentrated winding coils 7 of the plurality of phases are provided. Each winding end position of the multi-phase concentrated winding coil 7 is arranged closest to the corresponding connection ring 3 among the plurality of connection rings 3.
Thereby, since the length of the lead wire from the winding end to the connection ring 3 can be shortened, it is possible to prevent the lead wire, that is, the coil terminal 10 from being disconnected due to vibration or the like. Therefore, the durability and reliability of the concentrated winding stator 8 can be improved, and the durability and reliability of the rotating electrical machine 100 including the concentrated winding stator 8 can be improved.

(2) The concentrated winding stator 8 has a divided core structure in which a plurality of concentrated winding coils 7 having salient pole concentrated windings and a plurality of teeth 5a around which the plurality of concentrated winding coils 7 are wound are formed. The plurality of cores 5 and the plurality of connection rings 3 that connect the concentrated winding coils 7 of the plurality of phases are provided. The plurality of connection rings 3 have different diameters. The winding end positions of the multi-phase concentrated winding coil 7 are present at three different locations in the radial direction.
Thereby, since the length of the lead wire from the winding end to the connection ring 3 can be shortened, it is possible to prevent the lead wire, that is, the coil terminal 10 from being disconnected due to vibration or the like. Therefore, the durability and reliability of the concentrated winding stator 8 can be improved, and the durability and reliability of the rotating electrical machine 100 including the concentrated winding stator 8 can be improved.

(3) Each of the concentrated winding coils 7 varies the winding end position by changing the number of winding stages and / or the number of rows for each phase. As a result, the number of turns of the insulating coating conductor 1 can be made equal for each phase, and the amount of rotating magnetic field generated in each phase of the concentrated winding coil 7 can be made equal, so that the operation of the rotating electrical machine 100 can be stabilized.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, although the concentrated winding has been described with reference to FIGS. 2 to 5, the case of a rotating electrical machine having the same problem as the concentrated winding is also included. Although the main technique of the present invention is to shorten the wiring distance to the connection ring 3 and improve the mechanical strength, a connection method other than the connection ring 3 is not excluded. The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Although the number of energized phases is three, the present invention can be applied to a number of phases larger than three (for example, six phases). The present invention can also be applied to the 6-wire, 3-phase method in the recent invention. FIG. 10 shows a winding pattern in the case where there are six radial ends of the coil end. Even when the number of phases in the future increases to 9 or 12 phases, the radial position of the coil terminal may be set to 9 or 12 in the same way.

  In the above description, the star connection is used as the connection method. However, in the case of the delta connection, the connection ring 3N for neutral point connection is eliminated, but the present invention can be applied. Note that the present invention can also be applied to a case where the radial positions of the coil start coil terminals are different.

  In the above description, it is a precondition that the number of turns of the insulation coating conductor 1 is equal in each phase, but this does not exclude the difference in the number of turns within ± 1 turn caused by the winding pattern and the coil stack pattern. Absent. Similarly, it is a precondition that the wire diameter of the insulation coating conductor 1 of each coil (in the case of a square wire or the like, the vertical length and the horizontal length of the wire) are equal, but the tolerance of the copper wire and the winding It does not exclude differences due to wire elongation due to winding machine tension. Moreover, the structure which mixes a round wire and a square wire in one coil by deform | transforming a copper wire is not excluded.

  In the above description, the permanent magnet type rotating electric machine has been described. However, since the feature of the present invention is that the position of the end coil end is different, the rotor is not a permanent magnet type, but an induction type or synchronous type. It can also be applied to reluctance, claw pole type, and the like. Next, the explanation is given for the inner rotation type, but the same applies to the outer rotation type, linear motor, and axial gap type.

DESCRIPTION OF SYMBOLS 1; Insulation film conductor, 3,3N, 3U, 3V, 3W; Connection ring, 5; Core, 7; Concentrated winding coil, 8; Concentrated winding stator, 9; Rotor, 10; 101; Winding coil terminal (coil terminal), 102; Winding coil terminal (coil terminal)

Claims (6)

A multi-phase stator coil with salient pole concentrated windings;
A stator core formed with a plurality of teeth around which the multi-phase stator coils are wound;
A plurality of connection rings connecting each of the multi-phase stator coils,
Each winding end position of the multi-phase stator coil is disposed closest to a corresponding connection ring among the plurality of connection rings ,
Wherein each of the plurality of phases of stator coils, that are at different positions of end the winding by changing the number of stages and / or number of columns of the winding for each phase stator. The stator according to claim 1 ,
The multi-phase stator coils are U-phase, V-phase, and W-phase stator coils;
Each of the plurality of connection rings has a different diameter,
The winding end positions of the U-phase, V-phase, and W-phase stator coils are different from each other in the radial direction. The stator according to claim 2 , wherein
The winding used for the U-phase, V-phase, and W-phase stator coils is a wire having a constant wire diameter, or a rectangular wire having a vertical length and a horizontal length equal to each other. A certain stator. A multi-phase stator coil with salient pole concentrated windings;
A stator core formed with a plurality of teeth around which the multi-phase stator coils are wound;
A plurality of connection rings connecting each of the multi-phase stator coils,
Each of the plurality of connection rings has a different diameter,
The winding end positions of each of the multi-phase stator coils are present at three or more different locations in the radial direction ,
Wherein each of the plurality of phases of stator coils, that are at different positions of end the winding by changing the number of stages and / or number of columns of the winding for each phase stator. In the stator according to any one of claims 1 to 4 ,
The multi-phase stator coil is a stator in which the number of windings is equal. The stator according to any one of claims 1 to 5 ,
A rotating electric machine comprising: a rotor arranged rotatably with respect to the stator core via a predetermined gap.

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